With the ongoing back and forth relating to girls and boys and Scouting, I found this historical synopsis of the interactions of early youth serving groups being established very interesting. Take a look. It seems clear to me that major players in BSA, along with other groups of the time were very interested in girls and boys being involved, often together. Take a look.
Historical origins of Camp Fire - by Alice Marie Beard The organizational history and the story of the origins of Camp Fire are complex. There is the official version presented in the book Wo-He-Lo: The Camp Fir